Medical Imaging: Radiography, PET, CT, MRI, Ultrasound, SPECT. a) For the above
ID: 1625422 • Letter: M
Question
Medical Imaging: Radiography, PET, CT, MRI, Ultrasound, SPECT.
a) For the above 6 imaging modalities, build two groups by grouping ionizing and non-ionizing imaging modalities
b) Which one of the above imaging modalities is considered to be the absolute safest, to be used also on children and pregnant women?
c) In the above listed systems, which system is the most expensive financially?(Do not consider the cost of a cyclotron in this instance)
d) For the anatomical description of the musculoskeletal system of a patient, you want to have accurate tomographic images of the skeleton, as well tomographic images of the muscles and tendons. Which two imaging modalities of the above would you combine, and use for what?
e) PET, SPECT, CT, MRI: Order the systems according to their spatial resolution (in plane), from the highest to the lowest resolution.
Explanation / Answer
A) The Ionizing ones include : CT, Radiography, PET, SPECT
The ones using non-ionizing imaging modalities : MRI, Ultrasound.
B) Ultrasound is the safest modality during pregnancy and for children since it uses low intensity sound to produce image contrary to radiations in other methods.
C) Of the above mentioned a CT scan is the most expensive imaging technique due to complicated software and hardware integrations and 360 degree scanning facility .
D) CT and MRI
CT has the best resolution for bone fractures and tomography, whereas MRI has great resolution power of for muscles making it very useful to know the extent and exact location of damage.
E) CT > MRI > PET > SPECT